File :: extractValue: Bitrix method

      
<?php 
//  Bitrix\Bizproc\BaseType\File :: extractValue()
//  /dist/bitrix/modules/bizproc/lib/basetype/file.php:303

    protected static function extractValue(FieldType $fieldType, array $field, array $request)
    {
        $value = parent::extractValue($fieldType, $field, $request);

        if (is_array($value) && !empty($value['name']) && !empty($value['tmp_name']))
        {
            if (!is_uploaded_file($value['tmp_name']))
            {
                $value = null;
                static::addError([
                    'code'      => 'ErrorValue',
                    'message'   => Loc::getMessage('BPDT_FILE_SECURITY_ERROR'),
                    'parameter' => static::generateControlName($field),
                ]);
            }
            else
            {
                if (!array_key_exists('MODULE_ID', $value) || strlen($value['MODULE_ID']) <= 0)
                    $value['MODULE_ID'] = 'bizproc';

                $value = \CFile::saveFile($value, 'bizproc_wf', true);
                if (!$value)
                {
                    $value = null;
                    static::addError([
                        'code'      => 'ErrorValue',
                        'message'   => Loc::getMessage('BPDT_FILE_INVALID'),
                        'parameter' => static::generateControlName($field),
                    ]);
                }
            }
        }
        elseif (\CBPActivity::isExpression($value))
        {
            //It`s OK
        }
        else
        {
            $value = null;
        }

        return $value;
    }